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the value of parameter a is `variable a ## Images Provide either a path to a local image file or the URL of an image.
print('hello world!')## [1] "hello world!"
Install ‘gapminder’ from CRAN:
install.packages("gapminder")Or you can install ‘gapminder’ from Github:
devtools::install_github("jennybc/gapminder")Load and test
library("gapminder")## Warning: package 'gapminder' was built under R version 3.4.4
aggregate(lifeExp ~ continent, gapminder, median)## continent lifeExp
## 1 Africa 47.7920
## 2 Americas 67.0480
## 3 Asia 61.7915
## 4 Europe 72.2410
## 5 Oceania 73.6650
#> continent lifeExp
#> 1 Africa 47.7920
#> 2 Americas 67.0480
#> 3 Asia 61.7915
#> 4 Europe 72.2410
#> 5 Oceania 73.6650
library("dplyr")## Warning: package 'dplyr' was built under R version 3.4.3
##
## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
##
## filter, lag
## The following objects are masked from 'package:base':
##
## intersect, setdiff, setequal, union
gapminder %>%
filter(year == 2007) %>%
group_by(continent) %>%
summarise(lifeExp = median(lifeExp))## Warning: package 'bindrcpp' was built under R version 3.4.4
## # A tibble: 5 x 2
## continent lifeExp
## <fct> <dbl>
## 1 Africa 52.9
## 2 Americas 72.9
## 3 Asia 72.4
## 4 Europe 78.6
## 5 Oceania 80.7
#> # A tibble: 5 x 2
#> continent lifeExp
#> <fctr> <dbl>
#> 1 Africa 52.9265
#> 2 Americas 72.8990
#> 3 Asia 72.3960
#> 4 Europe 78.6085
#> 5 Oceania 80.7195
library("ggplot2")## Warning: package 'ggplot2' was built under R version 3.4.4
ggplot(gapminder, aes(x = continent, y = lifeExp)) +
geom_boxplot(outlier.colour = "hotpink") +
geom_jitter(position = position_jitter(width = 0.1, height = 0), alpha = 1/4)library(DT)## Warning: package 'DT' was built under R version 3.4.4
data(airquality)
datatable(airquality, caption = "New York Air Quality Measurements")